Tetsuo Tosu is a typical father whose biggest worries are his job and his rebellious daughter, Reika. That is, until he finds a bruise on her face. His worst fears come true when he finds out she has a secret boyfriend…and he’s part of a crime ring that’s using her to steal her grandparent’s wealth. If that wasn’t bad enough, the thug catches Tetsuo snooping around and threatens to kill Reika as soon as she gets home. Fueled by fatherly instincts, Tetsuo murders the man…only for his wife to walk in and witness what he’s done. Now with a corpse to hide and a crime ring hot on his tail, Tetsuo must resort to his love of detective novels and his wits to stay one step ahead of a grim fate…
Haunted by the horrors of a bloodbath he devised, Tetsuo is crushed by guilt. With his village now reduced to ruins, Tsukuyomi gives Tetsuo an ultimatum—to die by the sword, or to avenge Tsukuyomi's fallen brothers and sisters by fighting Kubo head-on. In a final showdown of brains versus brawn, Tetsuo must employ every last trick up his sleeve to defeat the monster behind the massacre and reunite with his family.